The ancient Celtic celebration of Samhain, observed on November 1, serves as the origin for All Saints' Day and All Hallows Eve. This period was considered a kind of New Year's holiday among the Celts, marked by a belief that the boundary between this world and the spirit world became permeable, allowing spirits to cross more easily. Superstitious individuals, fearing these spirits, would leave out food and treats to avoid curses. Various practices, such as divination to contact departed loved ones, were common during this time. Druids sought guidance from the dead, and bards looked for otherworldly inspiration for their creative works. Additionally, Samhain was regarded as occurring in no-time, neither in the old year nor the new, suspending normal laws, order, and customs for three days of merriment and chaos, during which people indulged in unrestrained behavior and revelry.

Sunset on October 31 marks the beginning of All Hallow's Even, better known as Halloween, which initiates All Hallows (or Saints') Day. This occasion, originally a Celtic harvest festival called Samhain that involved spiritism and superstitious rituals, was later adapted by the Roman Catholic Church and linked with the celebration of All Saints' Day. While many view this time as harmless fun, an opportunity for creativity and indulgence, it fundamentally glorifies evil beneath its surface. The rituals of Halloween, both ancient and modern, do not promote life but instead revel in trickery, sorcery, spiritism, and the dark ways of the evil one. Christians are urged to avoid involvement in such practices, as they stand in opposition to the eternal life that comes from knowing the Father and the Son.